Grate.



J. C. BAMLETT.`

GRATE.

APPLIGATIQN FILED 13,120.29, 190B.

' Patented Jan. 11, 19M).

ric.,

JOHN C. BARTLETT, OF PHILADELPHIA, PENNSYLVANIA.

GRATE.

To aZZ lwhom it may concern:

Be it known that I, JOHN C. BARTLETT, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Grates, of which the following is a specification.

One object of my invention is to provide a grate of the type ordinarilyemployed in furnaces of heaters, stoves and the like, which while beingsimple and substantial in construction may be conveniently operated toshake out or dislodge the ashes accum'ulated at the lower portion of thetire.

It is further desired to provide a grate made a number of parts sointerconnected that one or more of them shall be moved when power isapplied to another part; it being especially desired that the parts ofthe grate shall move in different ways and directions in order that theashes may be eliticiently and quickly removed with a minimum ofexertion.

Theseobjects and other advantageous ends I secure as hereinafter setfort-h, reference being had to the accompanying drawings, in whichEigure l, is a vertical section of a portion of a furnace, illustratingmy invention as applied thereto; Fig. 2,isaplan of the grate employed inthe furnace shown in Fig. l; Fig. 3, is a vertical section on the line 33, Fig. 2; Fig. 4, is a slightly modified form of my invention in whichthe power for shaking the grate is applied to the grate frame; Fig. 5,is a vertical section of the grate frame; and Fig. 6, is a perspectiveview of one of the grate bars.

In the above drawings, A represents the fire brick lining of a typicalfurnace, at the bot-tom of which is supported a basket B having inwardlyslopingsides preferably notched to form teeth. Immediately below thebasket are mounted a grate frame C and any suitable number of ygratebars D; these latter being preferably of the construction shown in Fig.G and having extending from each end a bar Z. These bars enter suitablebearings formed in the frame of the stove or furnace so as to permit thegrate bars to rotate upon them as axes. Each of the extensions Z isprovided with an eccentric or crank portion Z of any desired or suitableeccentricity and from Figs. l, 3 and 5, it will be noted that the grateframe C, which is of a rectangular and annular form, has at its oppositeends a number of pairs of downwardly Speccation of Letters Patent.

Application filed December 29, 1908.

Patented Jan. 11, 1910.

Serial No. 469,789.

extending lugs o, each pair of which extends around one of the crankportions; that is to say, the said frame C rests upon and is supported'by the crank portions of the grate bars, and it will be seen to consistof a substantially flat and in the present instance generallyrectangular, open frame, in the central space of which are arranged thethree grate bars I). The inner edges of the frame C are preferablyprovided with a downwardly extending flange c which is adjacent to theends of the teeth Z2 of the grate bars, and if desired, I may also formteeth in the outer edges of said grate frame. Each of the grate bars hasxed to its rod Z ay gear Z3 and all of said gears are placed in the sameplane so as to be capable of engagement with a toothed rack Z4 supportedin any suitable manner upon the framework of the furnace so as to belongitudinally movable.

The central one of the grate bars D in that form of the invention shownin Figs. l to 3 inclusive, has its rod Z provided wit-h an eye Z6 forthe reception of an operating lever ZT whereby it is possible to impartan oscillatory movement to said grate bar.

It will be noted that the grate frame C extends immediately below butsome distance from the lower edge of the basket B and when one of thegrate bars D is oscillated as above noted, not only are the remaininggrate bars simultaneously oscillated by power transmitted from the gearZ3 on the first bar through the rack Z4 and thence to the other gears,but the grate frame C is itself given a reciprocatory motion, and is, atthe same time, slightly raised and lowered owing to the fact that itres-ts upon the eccentric or crank portions Z of the various grate bars.The grate frame thus advances toward and recedes from the bottom of thebasket B at the same time that it is moved to and fro under the same,while in addition the oscillation of the grate bars causes them to bealternately tilted in opposite directions, so that the fire supported onthe grate is very thoroughly stoked and the ashes quickly separated.

Instead of applying to the grate bars the power for shaking the grate,it may be, if desired, applied as shown in Figef, where a. suitableoperating lever ZS is connected by a link Z9 to the grate frame C whichis not only reciprocated by it, but through the cranks Z, imparts anoscillatory movement to the grate bars so that the operation is similarto that above described.

From the description and illustration it will be obvious that the re maybe cleaned with the greatest convenience by the use of a poker insertedbetween the lower edge of the basket B and the upper surface of thegrate frame; and in addition the fire may be easily dumped by asuiiicient rotation of the grate bars.

I claim.

l. A grate for a furnace consisting of a grate bar having crankstructures and rotatable about its longitudinal axis; with a grate framecarried on said crank structure; and means for rotating the grate barand thereby causing a bodily up and down movement of the grate frame.

2, The combination in a grate of a grate bar rotatable about itslongitudinal axis; and a grate frame mounted on said bar; said grateframe and bar being so connected that the grate frame is bodily raisedor lowered when the grate bar is rotated about its longitudinal axis.

3. The combination of an annular grate frame; a grate bar supportingsaid frame; with means for causing a simultaneous oscillation of saidbar and a bodily up and down movement of the frame.

il. The combination in a grate of a supporting structure; a grate barcarried thereby and having crank portions; with a grate frame carried onsaid crank portions and free to move bodily up and down; with means forcausing longitudinal turning of the grate bar and thereby simultaneouslyoscillating said frame.

5. The combination in a furnace of a basket; a plurality of grate barshaving cranks; an annular grate frame carried solely by said cranksadjacent to the basket; and means for longitudinally turning the gratebars to bodily7 raise or lower the grate frame.

6. The combination in a furnace of a basket; a movable grate framesupported below said basket; grate bars mounted to turn on theirlongitudinal axes; and means for simultaneously moving the grate frameand the bars; said means including con' nections between the frame andthe bars capable of causing an up and down movement of said frame whensaid bars are turned on their axes.

7. The combination in a grate of a series of grate bars each having acrank at each end and mounted to be free to turn on longitudinal axes;with a grate frame extending around the fuel supporting portions of saidbars and supported on the crank portions thereof so as to be bodilyraised or lowered when said grate bars are turned.

S. The combination in a furnace of a basket; a series of grate barsmounted bei low the saine and free to turn on their longitudinal axes;an annular grate frame supported on said grate bars under 'the basketand surrounding the fuel supporting portion thereof; with connectingmeans between the frame and the bars arranged to cause an up and downmovement or said frame relatively to the bars when the latter areaxially turned.

.ln testimony whereof, l have signed my name to this specification, inthe presence of two subscribing witnesses.

JOHN C. BAR LETT litnesses Wir. E. Srinrn, VM. A. Bann.

